Police on Thursday said that Amit Rai, the victim's friend has been arrested while five others are absconding.
According to the 15-year-old victim, a resident of Deepika Police station area, she was returning from school on January 28 when she met Amit.
Amit allegedly took her along on the pretext of searching for his sister and raped her.
Afterwards, he sent her to Bilaspur by truck. At Bilaspur, she was allegedly picked up by four others who kept her in confinement and raped her for 10 days.
Later, they dropped her in Raipur, police said.
As she was contemplating suicide on railway tracks, a youth called Sanjay stopped her and took her home and allegedly raped her, they said.
Railway police later found her roaming in the Raipur railway station premises and sent her back to her home at Korba.
The girl informed the authorities about the rapes on Wednesday, following which Amit was arrested.